Business Details
11 Years
experience
Seattle's Trusted Solar Energy Partner
Sphere Solar Energy was founded in 2015 by Edwin Wanji, whose childhood experiences in Kenya sparked a lifelong commitment to clean energy accessibility. We specialize in solar energy solutions for commercial, residential, and community projects, combining technical expertise with social responsibility. Our services include solar panel installation, battery storage systems, EV charging stations, and energy consulting. Certified as a minority-owned business and union-signatory contractor, we've installed over 4 megawatts of solar capacity across diverse projects including schools and non-profits.We prioritize environmental stewardship through Tier 1 equipment with 25-year warranties and a 10-year workmanship guarantee. Our community focus extends globally through Sphere One, which donates 10% of profits to solar projects in underserved regions. With operations in the Pacific Northwest and international reach, we combine local expertise with global perspective to deliver sustainable energy solutions.
Services
Commercial Solar
Residential Solar
Battery Storage
EV Charging
Ground Mounted Systems
System Monitoring
Energy Consulting
Electrical Engineering
Details
- Year established: 2015
Highlights and features
- We offer 25-year equipment warranties on all solar installations
- Our team includes certified Enphase battery storage installers
- Community-focused approach with 10% of profits donated to global solar projects
- Experienced with over 4 megawatts of installed solar capacity
- Union-signatory electrical contractors with minority-owned business certification
Associations and certifications
- Enphase Elite Installer
- Tesla Powerwall Certified
- Outback Power Partner
What people say
Seamless installation
Top quality materials
Expert customer support
Zero electric bills
Smooth project process
Services
Commercial Solar
Custom commercial solar arrays reduce business energy costs while demonstrating environmental responsibility. Our systems integrate with existing infrastructure and qualify for federal tax credits. With expertise in large-scale installations, we deliver ROI through reduced utility bills and potential revenue from excess energy sales.
Battery Storage
Certified installation of advanced battery systems from Enphase, Tesla, and Outback Power. These systems provide energy independence through grid outage protection and optimized energy use. Our experts design configurations that maximize storage capacity and system efficiency for both residential and commercial applications.
EV Charging
Professional EV charging station installation for homes and businesses. Our certified electricians ensure safe, code-compliant setups that maximize charging efficiency. Solutions scale from single residential units to commercial fleets, supporting the transition to sustainable transportation infrastructure.
Residential Solar
Custom solar solutions for homeowners seeking energy independence. Our installations include 25-year equipment warranties and monitoring systems to track energy production. We handle all aspects from design to permitting, with financing options to suit various budget needs.
Ground Mounted Systems
Optimized ground-mounted solar arrays for properties with limited roof space. Our designs consider land use, system orientation, and local regulations to maximize energy production. Durable mounting systems ensure long-term performance in various environmental conditions.
People
Edwin Wanji
Founder and CEO
15+ years in construction and solar energy. Founded Sphere Solar in 2015 after childhood experiences with energy poverty in Kenya. Combines technical expertise with community focus.
Maria Zaller
Solar Design Consultant
B.A. in Strategic Communications. Specializes in residential solar design solutions. Holds key solar industry certifications and focuses on customer education.
Peter Brandes
Senior Electrician
Licensed electrical Journeyman with expertise in solar system integration. Ensures all installations meet safety standards while optimizing system performance.
Robert Nuese
Responsible Managing Officer
California operations lead with extensive electrical contracting experience. Oversees project execution and technical compliance for commercial installations.
Sarah Ali
Program Manager
Workforce development specialist focused on diversity initiatives. Manages community programs that train underrepresented groups in clean energy technologies.
Questions
What factors affect solar installation costs?
System size, energy needs, roof type, and location impact costs ranging from $20,000–$40,000 for residential projects.
Are there tax incentives available?
Yes, qualify for 30% federal tax credit and Washington State's zero sales tax on solar purchases.
How does net metering work?
Sell unused solar energy back to utility providers at standard rates through state-mandated net metering programs.
What warranties are provided?
25-year manufacturer warranties on panels and 10-year workmanship warranties cover all installations.
Can solar work with shaded properties?
Yes, our experts design systems that maximize production even in partially shaded environments.
How to monitor solar production?
Free Enphase Enlighten software provides real-time monitoring of energy production and system performance.
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